Vascular – Exotic
Dicotyledonous Herbs - Composites
The National Vegetation Survey (NVS) Databank is a physical archive and electronic databank containing records of over 94,000 vegetation survey plots - including data from over 19,000 permanent plots. NVS maintains a standard set of species code abbreviations that correspond to standard scientific plant names from the Ngä Tipu o Aotearoa - New Zealand Plants database.
This annual plant grows up to around 1.5 - 2 m tall. There are 3 -5 leaflets, which are tapered ovals with serrated margins. They are bright green, slightly hairy and on brown stems with parallel ridges. The numerous terminal flowers are yellow in a tightly packed head (approximately 7 mm across). (Ermert and Clapp 1998)
bidens: From the Latin bi- ‘two’ and dens ‘teeth;, the seed having two tooth-like projections
Reason For Introduction
The ‘Cobbler’s pegs’ are the seeds, which are dark brown or black, slender and have barbed ends, which allows them to catch in material or fur. The pegs are in a ball or starburst formation on the plant with the barbs on the outer edge. (Ermert and Clapp 1998)